Furnace dead-plate.



A. W. PETTIE, JR.

FURNACE DEAD PLATE.

APPLICATION FILED JAN. 17,1916.

1,223,828. Patented Apr. 24,1917.

'Fjiql.

ADELBERT W. PETTIE, 33., OF BOSTON, MASSACHUSETTS, ASSIGNOR F ONE-HALF 'lO CHARLES N. MORGAN, 0F TROY, NEW YORK. 1

FURNACE DEAD-PLATE.

Application filed January 17, 1916.

To all whom it may concern.

Be it known that I, ADELBERT W. PETTIE, Jr., residing at Boston, in the county of Sufi'olk and State of Massachusetts, have invented certain new and useful Improvements in Furnace Dead-Plates, of which the following is a specification.

In the present arrangement of dead plates used in furnaces it is usual. to provide a single plate that runs the entire length of the furnace front, between the arched openings to the furnace and the ash pit upon which rest the jambs of the fire-brick arches.

Experience has shown it often necessary to remove the said dead plate, owing to its warped or burned condition, due to the intense heat that abuts it.

In order to accomplish the removal of the said dead plate, in the present styles or types of dead plates, it is necessary to remove the entire fire-brick arch and the jambs.

Oftentimes the fire-brick will be in good condition and remain so indefinitely in its F original position, and to remove it renders it worthless and makes it necessary to put in new fire-brick, an expensive item.

Again, in the use of the present conventional style of dead plate, as before noted, when the fire-brick has been so burned as to render it useless and must therefore be replaced by new tire-brick, the dead plate, which may still be in fair condition, though somewhat warped or burned, is often replaced by a new dead plate to insure the length of the life of the new fire-brick, and thus the old plate is a loss to the furnace owner, although it may have lasted quite a while longer.

The object of my invention is to provide an improved means for so mounting dead plates in furnace fronts, whereby the destruction of the fire-brick or the plates is materially overcome and in the use of which it will not be necessary to renew a dead plate when renewing the furnace front arches, and the old dead plate be used until it is worthless, because of its condition.

My invention further has for its purpose o to provide a simple, inexpensive and effective means for mounting the dead plates independent of the fire-brick arches and jambs, that they may be readily lifted from their supports or bearings so they may be quickly reversibly adjusted to the operative position.

Specification of Letters Patent.

Patented Apr. 24:, 1917.

Serial No. 72,531.

With other objects in View that will be hereinafter apparent, this invention consists in the peculiar combination and arrangeinent of the parts hereinafter fully explained, specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which 1 Figure 1 is a perspective View of a furnace front, parts being broken away to bet ter illustrate the manner in which my dead plates are cotiperatively connected therewith.

Fig. 2 is a diagrammatic perspective View of a furnace front with my invention operatively applied, one of the dead plates being removed to clearly illustrate the supports therefor.

Fig. 3 is a vertical section of the front wall of the furnace and the arched front and illustrates the manner in which the dead plate is removed.

Fig. t illustrates different forms of the dead plate.

Fig. 5 illustrates different forms of the supports for the dead plate.

Fig. 6 is an enlarged detail perspective view of the notched end of the dead plate.

In the drawing and referring particularly to Fig. 2, 1 designates the fire-brick jambs of the arched openings 2-2, 3-8 the firebrick arches and 44 the base or pier supports on which the fire-brick ambs 1-1 are built up, the said parts being of the usual form and in practice faced by a fancy iron front 5, best shown in Fig. 1.

In my arrangement of the dead plate surface for the furnace front, instead of forming the said plate of a single member that extends across the full width of the front and mounted on the several piers 4 and supporting the arch j ambs, it consists of a separate member 6 for each of the arched open ings 2 of a length to freely move flatwise up or down within the said openings 2 and adapted to loosely rest upon supports 77 that project from the piers, in which they are built.

The supports or brackets 7-7 may be flat iron bars in operative condition buried in the side masonry, with an end projecting to form a fiat bracket, as shown at 71, (Figs. 2 and 3) or the said projecting end bent up at right angles to form an angled support 7 2, the latter form having an advantage since the bracket portion 72 tends to keep the member 7 from shrinking back into the masonry, and the supporting end from burning or wearing off as quickly as is possible with the straight end support.

The dead plates, in plan view are shaped to suit the horizontal plan of the furnace openings and are of the width and length the same as that of the arched opening between the side jambs, and the said plates, when in the operative position, form the top of the ash pit front and extend back to the grate surfaces, as shown.

At the front edge each dead plate has a notch 8, and at the top and bottom said plate has grooves 80-80 that merge with and extend inwardly from the notch 8, and at right angles to the said front edge, and when the said plates are placed in the operative position, the notched end of the plate abuts the metal front or furnace casing, as is clearly shown in Fig. 3.

By reason of providing each arched opening in the front wall of the furnace with an independent dead plate and mounting the same as shown and described, any one of the said plates that need be reversed, on account of warping or being burned, can be easily lifted from its seat by inserting a suitable implement having a hooked end, through the furnace door, down along the inside of the metal front and through the notch 8 in the front edge of the plate with the hook X j extended into the groove 80 on the under side, the said groove tending to steady the said hook end of the lifting implement (see X, Fig. 3) when raising the plate from its seat.

In the use of my form of dead plate, it will not be necessary to renew a dead plate when renewing the arches, as my plate is independent of the arches and the same dead plate may be used until it is worthless because of its condition.

Again my dead plate can be readily reversed and sustained on the end supports, either face up, with the notched end front, the notch with the two grooves providing for readily applying a rod-like implement to engage the plate for lifting it, no matter which face up.

It is understood that the dead plates vary as to size, shape and thickness, according to the furnace in which the same is to be used.

From the foregoing description taken in connection with the drawings, the complete arrangement, the manner of use and the advantages of my invention will be readily understood by those skilled in the art to which it appertains.

l/Vhat I claim is:

1. In a furnace front, the combination with the side piers, the fire-brick jambs'and the arched fire-brick top; of a dead plate independent of the said j ambs shaped to snugly fit within the opening between the said jambs and supports projected inwardly from the jambs on which the plate is adapted to be reversibly mounted.

2. In a furnace front, the combination with the metal casing or front plate having a door closed inlet, a fire-brick front that abuts the casing and includes opposite side jambs and an arched top; of a dead plate having the plan shape of the opening in the fire-brick front, supports projected inwardly from the jambs on which the said plate is adapted to loosely rest, the front edge of the plate abutting the front casing at a point below the door opening, said front edge having a vertical notch and grooves in the upper and lower faces that merge with the notch, said notch grooves being adapted to receive a hooked implement for lifting the plate up from its seat to be removed from between its side jambs.

ADELBERT PETTIE, JR.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

